I can agree with that. I don't think it's necessarily needed.
On the other hand, one slight upgrade in the middle of a generation isn't so bad, as long as 100% backwards and forwards compatibility between the two is assured. It just has to be done in such a way that the hardware handles the upgrade and the software is basically blind to the difference.
Honestly, I think the basis of this is Microsoft realizing they screwed up with their eSRAM solution.